The key to mellow tone is to keep snakeskin. If you press the snakeskin with your fingers, there will definitely be a sinking reaction. Putting a pencil on a snakeskin rack is equivalent to putting a horse overhead, so that the strings will not oppress the snakeskin. Appropriate elastic snakeskin is very important to the timbre of erhu. Most good erhu snakeskin are tight.

The second is what the teacher said just now, put one or two pieces of desiccant in the piano box, which is unique to some puffed foods (be careful not to have greasy on it! One more thing, if you live in the dry north, it is recommended not to put it. If it rains in the south, you should put one or two palm-sized desiccants.

Third, it has something to do with the way you practice. Try to practice correctly and pronounce correctly, which is closely related to the running-in and vibration of erhu's autogenous structure.

Finally, I wish you happy learning piano, enjoying music and enjoying life.